ComboBox SelectedItem绑定不起作用

Question

我有一个包含四列的数据网格。

Mongoose: parentRecord.update({ _id: ObjectId("5551895182d9adbe1da34d6a") }) { '$inc': { __v: 1 }, '$set': { anotherField: 'anotherValue' }, '$pushAll': { fields: [ { _id: ObjectId("55518c682a0744dc20f1473b"), value: 'bar', name: 'foo' } ] } } {}

模型类<DataGrid ItemSource="{Binding MyDataSet,Mode=TwoWay}"> <DataGrid.Columns> <DataGridTemplateColumn> <DataGridTemplateColumn.CellTemplate> <DataTemplate> <TextBlock ...../> </DataTemplate> </DataGridColumn.CellTemplate> </DataGridTemplateColumn> <DataGridTemplateColumn> <DataGridTemplateColumn.CellTemplate> <DataTemplate> <TextBlock ...../> </DataTemplate> </DataGridColumn.CellTemplate> </DataGridTemplateColumn> <DataGridTemplateColumn> <DataGridTemplateColumn.HeaderTemplate> <DataTemplate> ............. </DataTemplate> </DataGridTemplateColumn.HeaderTemplate> <DataGridTemplateColumn.CellTemplate> <DataTemplate> <ComboBox ItemSource ="{Binding FirstComboBoxData }" SelectedItem="{Binding FirstComboBoxSelectedVal}"/> </DataTemplate> </DataGridColumn.CellTemplate> </DataGridTemplateColumn> <DataGridTemplateColumn> <DataGridTemplateColumn.CellTemplate> <DataTemplate> <DataTemplate> <ComboBox ItemSource ="{Binding SecondComboBoxData }" SelectedItem="{Binding SecondComboBoxSelectedVal}"/> </DataTemplate> </DataGridColumn.CellTemplate> </DataGridTemplateColumn> </DataGrid.Columns> </DataGrid> 如下所示。

MyData

然后我的ViewModel中有以下列表。

class MyData : ObservableObject
{
    private string _code;
    public string Code
    {
        set { _code = value ; OnPropertyChanged("Code");}
        get { return _code ;}
    }

    private string _name;
    public string Name
    {
        set { _name = value ; OnPropertyChanged("Name");}
        get { return _name ;}
    }

    private List<SomeOtherClass> _firstComboBoxData;
    public List<SomeOtherClass> FirstComboBoxData
    {
        set { _firstComboBoxData = value ; OnPropertyChanged("FirstComboBoxData");}
        get { return _firstComboBoxData ;}
    }


    private List<SomeOtherClass> _secondComboBoxData;
    public List<SomeOtherClass> SecondComboBoxData
    {
        set { _secondComboBoxData = value ; OnPropertyChanged("SecondComboBoxData");}
        get { return _secondComboBoxData ;}
    }

    private SomeOtherClass _firstComboBoxSelectedVal;
    public SomeOtherClass Name
    {
        set { _firstComboBoxSelectedVal= value ; OnPropertyChanged("FirstComboBoxSelectedVal");}
        get { return _firstComboBoxSelectedVal;}
    }

    private SomeOtherClass _secondComboBoxSelectedVal;
    public SomeOtherClass SecondComboBoxSelectedVal
    {
        set { _secondComboBoxSelectedVal= value ; OnPropertyChanged("SecondComboBoxSelectedVal");}
        get { return _secondComboBoxSelectedVal;}
    }


}
class SomeOtherClass
{
    private int id;

    public int ID
    {
        set { id = value ; OnPropertyChanged("ID");}
        get { return id ;}
    }
}

我看到一切都很好。但是，当我更改所述组合框的所选项目时， private ObservableCollection<MyData> _myDataSet; public ObservableCollection<MyData> MyDataSet { set { _myDataSet=value; OnPropertyChanged ("MyDataSet"); } get { return _myDataSet ;} } 相关的MyDataSet或FirstComboBoxSelectedVal未更新

我在某处做错了吗？